Variabilty of Oil and Protein Content in Rapeseed Cultivars Affected by Seeding Date

Abstract

The aim of this study was to determine the variability of oil and protein content in winter rapeseed cultivars affected by seeding date. Four cultivars (Banaćanka, Slavica, Express, Valeska) were sown at six seeding dates (SD1-21 August, SD2-31 August, SD3-10 September, SD4-21 September, SD5-1 October, SD6-9 October) across two cropping seasons. The trial was arranged as Randomized Complete Block Design (RCBD) with four replications. Analysis of variance (ANOVA) showed that the effect of year, cultivar and seeding date were highly significant for oil and protein content. Increased oil content in the second year (2010/2011) was related to weather conditions which were favorable for rapeseed. However, protein content was significantly higher in the first year (2009/2010). Oil content ranged between 41.19% (Valeska) and 42.69% (Express). Significantly lowest oil content across seeding dates was found in SD6 (40.67%), and highest in SD4 (41.86%) and SD1 (41.61%). Valeska showed significantly highest mean protein content (21.54%). Protein content was highest in SD6 (20.18%). Oil content decreased with delayed seeding. Highly significant negative correlation (r = -0.730) existed between oil and protein content. Seeding date had significant influence on oil and protein content in rapeseed. Cultivar Express and SD4 can be pointed out, based on the achieved oil content, and cultivar Valeska for high protein content. Study results may be helpful in recommending optimal rapeseed seeding date in the region.

Biometric Analyses of Yield, Oil and Protein Contents of Wheat (Triticum aestivum L.) Genotypes in Different Environments

“…The oil content from wheat bran (3-5%) or germ (7-9%) is much lower than that from main oil crops, such as sunflower (46%), safflower (32%), rapeseed (39%), soybean (20%), and linseed (34%). Also, the protein content of wheat (11-18%) is lower but better comparable with those reported for some conventional oil and protein crops like safflower (29.3%), sunflower (19.5%), peanut (30.3%), and rapeseed (21.5%) [42][43][44].…”

Kanolada (Brassica napus L.) Farklı Ekim Zamanı, Çeşit ve Tohumluk Miktarının Verim ve Kalite Özelliklerine Etkisi

“…In terms of climate parameters such as temperature, day length and rainfall, sowing date is one of the most important crop management for best yield. Many studies emphasized that sowing date significantly affected rapeseed yield (Johnson et al, 1995;Turhan et al, 2011;Balalic et al, 2017) and late sowing of rapeseed in winter type decreased seed yield (Pritchard et al, 2000;Ozer 2003;Uzun et al, 2009). It was concluded that rapeseed could be planted during the October-November period in the coastal zone of the Aegean region with a mild Mediterranean climate.…”

“…In our study, the crude oil rate varied from 39.75% to 45.13% depending on cultivars, sowing dates and years (Figure 2). The cultivar, crop management and the environment affected the oil rate of rapeseed in which it is grown and, the oil content of rapeseed changed was between 40.0% and 44.0% (Anonymous, 2014;Balalic et al, 2017). The highest crude oil rate was recorded in NK Petrol cultivar (43.34-43.54%) at the first sowing date in both years.…”

Coefficient of Explosion of Grape Oil Repas in Respect of Variety, Content of Humidity and Surface

“…Rape oil is used in people's eating, for the production of biodiesel, in the soap industry, for lubricating parts in machinery assemblies, etc. After grain pressing and oil extraction, oil rich cakes with proteins used in domestic animal feeding are obtained [1], [2], [3].…”